AstroPhot

Fit astronomical images jointly across objects, bands and observing epochs.

AstroPhot is a Python package for fitting models to astronomical images. It can fit multiple objects and images together, sharing parameters across bands or epochs while accounting for each image’s point-spread function. Built-in models cover galaxies, point sources and sky backgrounds, with model and residual images for inspecting fits.

Python package

Maturity

Stable

v0.18.0

Access

Public

No portal sign-in is required.

Maintainers

Connor Stone

What it supports

Use cases

Image modelling
Multi-band photometry
Crowded fields
Low surface brightness

Where it runs

Runtime homes

Installable packagePyPI

GitHub / templateGitHub

Documentation hostReadTheDocs

Install with pip install astrophot using Python 3.11 or later. Joint fits need consistent image coordinates and reliable variance and PSF estimates. Large fits may need to be divided into smaller groups to fit available memory.

Runtime, inputs & outputs

Distributions: Installable package · Source repository
Runtime: not-applicable
Access: public
Inputs: Not specified
Outputs: Not specified
Packages: astrophot

Names & abbreviations

CADC: Canadian Astronomy Data Centre
CanDIAPL: Canadian Data Intensive Astrophysics Platform

Connected work

Related science context

Astronomical image modellingAstroPhot fits galaxies, point sources and sky backgrounds across images, bands and observing epochs, with shared parameters and per-image point-spread functions.